You can refine your search by combining search terms using logical operators.
| ENTER AS | EFFECT |
|---|---|
|
heart failure |
documents containing either (or both) of the words |
| +heart +failure | documents containing both the words |
|
liver heart +failure |
documents containing liver and/or heart which must also contain failure |
|
"heart failure" |
documents containing both words as a phrase |
| heart -failure |
documents containing the first word but not the second |
| ENTER AS | EFFECT |
|---|---|
|
warfarin alcohol |
interactions between warfarin and alcohol |
| alcohol warfarin antihistamines | interactions between all pairs of warfarin, alcohol and antihistamines |
| +warfarin +alcohol | interactions between warfarin and alcohol |
|
+alcohol warfarin antihistamines |
interactions between warfarin and alcohol or antihistamines and alcohol |
|
"ace inhibitors" |
interactions of ace inhibitors |
| warfarin -alcohol | interactions of warfarin not involving alcohol |